7891656 has 32 divisors (see below), whose sum is σ = 20264640. Its totient is φ = 2559168.

The previous prime is 7891651. The next prime is 7891673. The reversal of 7891656 is 6561987.

It is not an unprimeable number, because it can be changed into a prime (7891651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3556 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (633270).

Almost surely, 2^7891656 is an apocalyptic number.

It is an amenable number.

7891656 is an abundant number, since it is smaller than the sum of its proper divisors (12372984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7891656 is a wasteful number, since it uses less digits than its factorization.

7891656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8933 (or 8929 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 7891656 is about 2809.2091413777. The cubic root of 7891656 is about 199.0930265464.

The spelling of 7891656 in words is "seven million, eight hundred ninety-one thousand, six hundred fifty-six".